Method, system and gateway device for enabling interworking between IP and CS networks

Inactive Publication Date: 2011-03-01
INTELLECTUAL VENTURES I LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0022]The connecting step may include the step of connecting user plane connections of the first and

Problems solved by technology

However, interworking between IMS and CS domains and between SI

Method used

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  • Method, system and gateway device for enabling interworking between IP and CS networks
  • Method, system and gateway device for enabling interworking between IP and CS networks
  • Method, system and gateway device for enabling interworking between IP and CS networks

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Embodiment Construction

[0032]The preferred embodiment will now be described on the basis of a SIP conferencing functionality in an IMS network environment.

[0033]FIG. 1 shows a schematic block diagram of the network architecture according to the preferred embodiment, wherein a GSM (Global System for Mobile communication) network 10 is connected to a SIP-based IMS network 30 via a Media Gateway Control Function (MGCF) 20 which controls a Media Gateway function (MGW) 40. The MGCF 20 is arranged to control the parts of a call state which pertain to connection control for media channels in the MGW 40. It communicates with Call Session Control Functions (CSCFs) as defined in the 3GPP specification TS 23.228. Furthermore, the MGCF 20 selects a CSCF depending on the routing number for incoming calls from legacy networks, such as the GSM network 10. The gateway functionality is achieved at the MGCF 20 by performing protocol conversion between ISUP and the IMS call control protocols. Out-of-band information assumed...

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Abstract

A method, system and gateway device enables interworking between an IP-based network and a circuit-switched network. A first address information of a first connection end located in the circuit-switched network is routed in a trigger message from the IP-based network to a gateway control function. The first and second call legs are established in parallel towards the first connection end based on the first address information, and towards a second connection end located in the IP-based network based on a second address information obtained from the trigger message. A single connection between the two connection ends is then established by connecting the first and second call legs. Thereby, IP-based signaling functionality can be used to add capability for subscribers located in the CS domain to be invited into conferences or calls with subscribers located in an IP-based domain, e.g. the IMS domain.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority of U.S. Provisional Application Ser. No. 60 / 456,953 entitled, “Method, System and Gateway Device for Enabling Interworking Between IP and CS Networks,” filed Mar. 25, 2003, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a method, system and gateway device for enabling interworking between an Internet Protocol (IP) network, such as an IP Multimedia Subsystem (IMS) network, and a circuit-switched (CS) network, such as a Global System for Mobile Communication (GSM) network.[0004]2. Description of the Related Art[0005]In order to achieve access independence and to maintain a smooth interoperation with wired terminals across the Internet, an IP multimedia subsystem (IMS) core network as specified e.g. in the 3GPP (Third Generation Partnership Project) specification TS 23.228 has been developed to ...

Claims

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Application Information

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IPC IPC(8): H04L12/16G06F15/16H04L12/66H04M3/42H04L12/56H04L29/06H04M7/00H04W92/02
CPCH04M7/128H04W92/02H04L65/1043H04L65/1006H04L65/1026H04L65/1036H04M7/0093H04L65/1016H04L65/1104
Inventor KALLIO, JUHAJYLHA-OLLILA, MARKKUMUTIKAINEN, JARI
Owner INTELLECTUAL VENTURES I LLC
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